Add 'EAN code' field to simple products and product variations - WooCommerce

Add 'EAN code' field to simple products and product variations - WooCommerce

/*
 * Add our Custom Fields to simple products
 */
function yl_woo_add_custom_fields() {

	global $woocommerce, $product, $post;

	$product = wc_get_product( get_the_id() );

	if ($product->is_type( 'simple' )) {

		echo '<div class="options_group">';

		// Number Field
		woocommerce_wp_text_input(
			array(
				'id'                => '_ean_code',
				'label'             => __( 'EAN code', 'yorlinq' ),
				'placeholder'       => '',
				'desc_tip'    		=> true,
				'description'       => __( "Enter the official EAN code.", 'yorlinq' ),
				'type'              => 'number',
				'custom_attributes' => array(
						'step' 	=> 'any',
						'min'	=> '0'
					)
			)
		);

		echo '</div>';

	}

}
// General Tab
//add_action( 'woocommerce_product_options_pricing', 'yl_woo_add_custom_fields' ); // After pricing fields
//add_action( 'woocommerce_product_options_downloads', 'yl_woo_add_custom_fields' ); // After downloadable file fields and only visible when it's a downloable product
//add_action( 'woocommerce_product_options_tax', 'yl_woo_add_custom_fields' ); // After tax fields
//add_action( 'woocommerce_product_options_general_product_data', 'yl_woo_add_custom_fields' ); // After all General default fields

// Inventory tab
add_action( 'woocommerce_product_options_sku', 'yl_woo_add_custom_fields' ); // After SKU field
//add_action( 'woocommerce_product_options_stock', 'yl_woo_add_custom_fields' ); // After Manage Stock field
//add_action( 'woocommerce_product_options_stock_fields', 'yl_woo_add_custom_fields' ); // After Manage Stock field but only visible is checked
//add_action( 'woocommerce_product_options_stock_status', 'yl_woo_add_custom_fields' ); // After Stock Status field
//add_action( 'woocommerce_product_options_sold_individually', 'yl_woo_add_custom_fields' ); // After Sold Individually field
//add_action( 'woocommerce_product_options_inventory_product_data', 'yl_woo_add_custom_fields' ); // After all Inventory default fields

// Shipping tab
//add_action( 'woocommerce_product_options_dimensions', 'yl_woo_add_custom_fields' );  // After Dimensions field
//add_action( 'woocommerce_product_options_shipping', 'yl_woo_add_custom_fields' ); // After all Shipping default fields

// Linked Products tab
//add_action( 'woocommerce_product_options_related', 'yl_woo_add_custom_fields' ); // After all Linked Products default fields

// Attributes tab
//add_action( 'woocommerce_product_options_attributes', 'yl_woo_add_custom_fields' ); // After all Attributes default fields

// Advanced tab
//add_action( 'woocommerce_product_options_reviews', 'yl_woo_add_custom_fields' ); // After Enable Reviews field
//add_action( 'woocommerce_product_options_advanced', 'yl_woo_add_custom_fields' ); // After all Advanced default fields

/*
 * Save our simple product fields
 */
function yl_woo_add_custom_fields_save( $post_id ){

	global $product;

	$product = wc_get_product( get_the_id() );

	if ($product->is_type('simple')) {
		// Number Field
		$woocommerce_ean_code = $_POST['_ean_code'];
		update_post_meta( $post_id, '_ean_code', esc_attr( $woocommerce_ean_code ) );
	}

}
add_action( 'woocommerce_process_product_meta', 'yl_woo_add_custom_fields_save' );

/*
 * Add our Custom Fields to variable products
 */
function yl_woo_add_custom_variation_fields( $loop, $variation_data, $variation ) {

	echo '<div class="options_group form-row form-row-first">';

 	// Text Field
	woocommerce_wp_text_input(
		array(
			'id'          => '_variable_ean_code[' . $variation->ID . ']',
			'label'       => __( 'EAN code', 'yorlinq' ),
			'placeholder' => '',
			'desc_tip'    => true,
			'description' => __( "Enter the official EAN code, for each product variation individually.", "yorlinq" ),
			'type'		  => 'number',
			'value' => get_post_meta( $variation->ID, '_variable_ean_code', true )
		)
 	);

	// Add extra custom fields here as necessary...

	echo '</div>';

}
// Variations tab
add_action( 'woocommerce_variation_options', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After variation Enabled/Downloadable/Virtual/Manage Stock checkboxes
//add_action( 'woocommerce_variation_options_pricing', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After Price fields
//add_action( 'woocommerce_variation_options_inventory', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After Manage Stock fields
//add_action( 'woocommerce_variation_options_dimensions', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After Weight/Dimension fields
//add_action( 'woocommerce_variation_options_tax', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After Shipping/Tax Class fields
//add_action( 'woocommerce_variation_options_download', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After Download fields
//add_action( 'woocommerce_product_after_variable_attributes', 'yl_woo_add_custom_variation_fields', 10, 3 ); // After all Variation fields

/*
 * Save our variable product fields
 */
function yl_woo_add_custom_variation_fields_save( $post_id ){

 	// Text Field
 	$woocommerce_variable_ean_code = $_POST['_variable_ean_code'][ $post_id ];
	update_post_meta( $post_id, '_variable_ean_code', esc_attr( $woocommerce_variable_ean_code ) );

}
add_action( 'woocommerce_save_product_variation', 'yl_woo_add_custom_variation_fields_save', 10, 2 );